html,body {
    width: 100%;
    height: 100%;
    
}

.box {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;position: relative;

}
.content {
    width: 590px;
    height: 470px;border:1px solid #ddd;
position: relative;
overflow: hidden;
}

.content ul {
   position: absolute;
   left: 0;
   top: 0;
    display: flex;
    align-items: center;


}



.indicator {
position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
   

}
.indicator span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #fff;
    margin: 0 5px;
    cursor: pointer;

}
.arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: rgba(0, 0, 0, .5);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    cursor: pointer;

}
.indicator span.active {
    background-color: #f40;

}
.btn-left {
    left: 10px;
}


.btn-right {
    right: 10px;
}